[TechAssist] Re: RCR CTC170R PS output runs hot
- From: "al m" <ampm@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 28 Feb 2005 18:16:20 -0500
If you get this problem all straightened out check for the melted spacers in
the PIP and the back video board.
Al Marquardt
ampm@xxxxxxx
Al Marquardt Electronic Repair
206 W Main
Girardville Pa. 17935
----- Original Message -----
From: "Technotronic Dimensions" <steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, February 28, 2005 4:23 PM
Subject: [TechAssist] Re: RCR CTC170R PS output runs hot
> Usually if there is a little bit of an overload going on with one line
> from
> the SMPS, it has an effect of reducing the output a little on one of the
> other lines too if its close to the limits of the SMPS overall current
> output rating.
>
> What were the (2) problems you repaired? This chassis is noted for a bad
> Focus /Regulator assy, which can either be caused by a bad flyback or vise
> versa. Usually the CBA attached to the Focus block is ok, and the focus
> block needs replacing....I have this focus block here , new , although its
> NLA.
>
> Steve Hearns
> Technotronic Dimensions, NY [USA]
> WWW.TECHNOTRONIC-DIMENSIONS.COM
> 1-877-817-9885 (Voice / Fax Toll Free - US Only)
> E-Mail: Steve@xxxxxxxxxxxxxxxxxxxxxxxxxxx
>
>
> ----- Original Message -----
> From: "John at Main TV" <maintv2004@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Monday, February 28, 2005 4:15 PM
> Subject: [TechAssist] RCR CTC170R PS output runs hot
>
>
> I am working on a RCA PS35680 direct view with a CTC170R chassis made in
> 1993. I have repaired 2 problems and now have a good picture but the PS
> output transistor runs hot. At one time someone had added a fan to keep
> the
> PS output cooler but I would like to eliminate that if possible. I have
> already replaced all electrolytics in the primary and several in the
> secondary circuit. The output voltages are correct ecxept the +16v is a
> little low. I have replaced the filters on that line. The PS output
> calls
> for a 214640 and the one is the set is a 2SC3318. My main question is is
> this a correct output for this set. It looks like it has been in there a
> long time but this set has had a lot of work done to it. The PS output
> runs
> around 170 degree F. TIA, John.
> John Mielke
> Main TV
> Longmont,Co 80501
> 303 776 6955
> 303 776 0792 fax
> maintv2004@xxxxxxxxxxx
> www.longmontmaintv.com
>
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